Inserted: 16 jan 2007
Last Updated: 21 may 2007
Journal: Mathematische Zeitschrift
Ricci curvature bounds in Riemannian geometry are known to be equivalent to the weak convexity (convexity along at least one geodesic between any two points) of certain functionals in the space of probability measures. We prove that the weak convexity can be reinforced into strong (usual) convexity.